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Geology; September 2006; v. 34; no. 9; p. 737-740; DOI: 10.1130/G22522.1
© 2006 Geological Society of America
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Extreme warming of mid-latitude coastal ocean during the Paleocene-Eocene Thermal Maximum: Inferences from TEX86 and isotope data

J.C. Zachos1, S. Schouten2, S. Bohaty3, T. Quattlebaum3, A. Sluijs4, H. Brinkhuis4, S.J. Gibbs5 and T.J. Bralower5

1 Earth Sciences Department, University of California–Santa Cruz, Santa Cruz, California 95060, USA
2 Royal Netherlands Institute for Sea Research, Department of Marine Biogeochemistry and Toxicology, P.O. Box 59, 1790 AB Den Burg, Texel, Netherlands
3 Earth Sciences Department, University of California–Santa Cruz, Santa Cruz, California 95060, USA
4 Laboratory of Palaeobotany and Palynology, Department of Biology, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands
5 Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802, USA

Changes in sea surface temperature (SST) during the Paleocene-Eocene Thermal Maximum (PETM) have been estimated primarily from oxygen isotope and Mg/Ca records generated from deep-sea cores. Here we present a record of sea surface temperature change across the Paleocene-Eocene boundary for a nearshore, shallow marine section located on the eastern margin of North America. The SST record, as inferred from TEX86 data, indicates a minimum of 8 °C of warming, with peak temperatures in excess of 33 °C. Similar SSTs are estimated from planktonic foraminifer oxygen isotope records, although the excursion is slightly larger. The slight offset in the oxygen isotope record may reflect on seasonally higher runoff and lower salinity.

Key Words: Paleocene • Eocene • isotopes • greenhouse




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T. Wagner, J. O. Herrle, J. S. S. Damste, S. Schouten, I. Stusser, and P. Hofmann
Rapid warming and salinity changes of Cretaceous surface waters in the subtropical North Atlantic
Geology, March 1, 2008; 36(3): 203 - 206.
[Abstract] [Full Text] [PDF]


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